How jquery determines whether the input data in the same column and different rows of the table is repeated_jquery

Copy code The code is as follows:

function hasRepeat(objId,columnIndex){
var arr = [ ];
$("#" objId " tbody tr").each(function(){
arr.push( $("td:eq(" columnIndex ")",this).text() ) ;
});
if( arr.length==$.unique( arr ).length ){
return false;
}else{
return true;
}
}

//Call
alert( hasRepeat(tableID, column index)==1?"There are duplicates":"No duplicates");